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base repository: aheckmann/node-gmp
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head repository: postwait/node-gmp
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  • 15 commits
  • 8 files changed
  • 1 contributor

Commits on Mar 13, 2011

  1. get this building and add floating point

    @postwait
    postwait committed Mar 13, 2011
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  2. Add float support and abort subversion. Optionally use the 

    sane approach (patch submitted to libgmp-devel list)
    @postwait
    postwait committed Mar 13, 2011
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  3. fix wscript to accept LINKFLAGS

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    postwait committed Mar 13, 2011
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  4. bail if code hacking doesn't work -- which is most cases unless you w… 

    …ere relatively insane compiling it all
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    postwait committed Mar 13, 2011
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Commits on Mar 16, 2011

  1. Do this the most evil way possible. This appear to work in my tests. 

    libgmp fellas are being unfortunately uncooperative in improving their
software, so it make sense to have a tenable solution without them.

This can and will badly malfunction at some point, I'm not sure I ever
want to run this in production -- time will tell.

This uses signals catching the SIGABRT and SIGFPE (the two raised in
libgmp) and siglongjmps out of them.  In single threaded programs the
SIGFPE should be entirely safe, the SIGABRT is a bit more risky.  We
limit the siglongjmp to when we know we've called into libgmp.

And I will end this with a parting note: libgmp can suck it.
    @postwait
    postwait committed Mar 16, 2011
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  2. add in bit precision as an optional arg to GFloat creation

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    postwait committed Mar 16, 2011
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Commits on Mar 17, 2011

  1. add Rational support and make the GETARG process protected as well

    @postwait
    postwait committed Mar 17, 2011
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  2. updated info

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    postwait committed Mar 17, 2011
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  3. rename README

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    postwait committed Mar 17, 2011
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  4. ## for markdown

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    postwait committed Mar 17, 2011
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Commits on Mar 19, 2011

  1. validate data types and support GInt as arguments to most Gint functi… 

    …ons. add cmp to GInt
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    postwait committed Mar 19, 2011
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  2. make the benchmark work

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    postwait committed Mar 19, 2011
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  3. cmp and test

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    postwait committed Mar 19, 2011
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  4. allow each type to operate on its own kind

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  5. toValue for ints

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Showing with 819 additions and 66 deletions.
  1. +0 −12 Makefile
  2. +0 −17 README
  3. +30 −0 README.md
  4. +5 −5 benchmarks/index.js
  5. +698 −27 node_gmp.cc
  6. +43 −0 node_gmp.h
  7. +34 −1 test/index.js
  8. +9 −4 wscript
12 changes: 0 additions & 12 deletions Makefile
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17 changes: 0 additions & 17 deletions README
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30 changes: 30 additions & 0 deletions README.md
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# node-gmp

## synopsis

node-gmp wraps the libgmp library. This library has some poor practices
when it comes to erro handling, so much trickery and deception is used to
make this stable under node. Trickery includes: replacement allocators,
replacement of jumps to abort() in instruction code and finally using
sigsetjmp and siglongjmp to emulate try/throw a across C and signals in a
more stable fashion.

The rest of gmp is just code.

var gmp = require('gmp')
var i = gmp.Int("123412341234123412341234123412341234");
i.div("2").toString() // "61706170617061706170617061706170617"
var f = gmp.Float("1234123412341234.123412341234", 1024).div("1.337");
f.toString().replace(/(\.\d{10}).*$/, "$1") // "923054160315059.17981476530867"
var r = gmp.Rational("22/7");
r.toString() // "3.142857142857143"

## requirements

* http://gmplib.org/ -- built with c++ enabled ( ./configure --enable-cxx )


## installation

# (useful environment variables: CXXFLAGS LINKFLAGS)
$ node-waf configure build
10 changes: 5 additions & 5 deletions benchmarks/index.js
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var gmp = require('./build/default/gmp');
var gmp = require('../build/default/gmp');

var a = "23450745058237458237438124381247381327401278039423904183123785901234679435237852037045375237485072304728904023748502374580723804572803745802374723098234509187142";
var b = "90894587590237850247890451273126743687548782309875623443738065740178101237431274810018971234126789867123769146910981289658964389538365892375427436672345780686388";
var a = new gmp.Int("23450745058237458237438124381247381327401278039423904183123785901234679435237852037045375237485072304728904023748502374580723804572803745802374723098234509187142");
var b = new gmp.Int("90894587590237850247890451273126743687548782309875623443738065740178101237431274810018971234126789867123769146910981289658964389538365892375427436672345780686388");


var num = 1000000;
var num = 100000;
var start = Date.now();
for (var i = 0; i < num; ++i){
gmp.mul(a,b);
new gmp.Int(1).mul(a).mul(b);
}
var seconds = (Date.now()-start)/1000;
var opssec = num / seconds;
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